On Tue, 2009-08-11 at 09:01 -0400, Lennart Sorensen wrote: > On Tue, Aug 11, 2009 at 08:57:46PM +1000, Microbit_Ubuntu wrote: > > I can't really give any specific help other than what you already tried, but > > I have been in a similar situation. > > I got some Olin 2 GB cards a little while ago and existing firmware I had > > running (using SPI) > > totally refused to run properly. Like you, I allowed the "hack" on the > > block length > > in CSD. My good old trusty card reader doesn't like the cards either. > > > > I spent a bit of time stepping around further in my code but I never pinned > > it down > > as to where these 2 GB cards went to lala land. I gave up I must say... too > > irritating. > > A look at the card vendor's URL revealed they expect the consumer to buy > > "their" card reader > > products, which of course is a joke. > > > > The last I checked, the consensus is/was that the 2 GB cards arena is a big > > mess. Apparently, > > more don't work than ones that actually do.... > > Seemed to me might as well move to HC... ? > > > > I certainly appreciate/sympathise - I found it very irritating to say the > > least : > > These cards are sold with the SD spec logo - but they don't __comply__ !!! > > I suspect the card does comply but the reader does not. A number of > readers assumed the block size on SD cards was 512 bytes even though the > spec never said that it was. most card sizes are, but e 1024 byte blocks. > Apparently the spec says that even the 2GB cards must support 512byte > reads and writes, but still some card readers/drivers get confused. > > I suppose it is also possible to have a 2GB card that was made to an > older spec before it was clarified that 512byte read/write was required > even when the block size was 1024byte. > > personally I have never had issues with 2GB cards in any device, but > all my 2GB cards are relatively new. >
Hi Lennart, > I suspect the card does comply but the reader does not. A number of I'm sorry but I disagree. The reader is stuck in an endless loop and never appears to even fully read the csd or tuples. I have tried with SPI and with MMC where I _was_ able to read the manufacturing details - manually - with my own firmware : it was February 2009 IIRC. It certainly was a brand new card, in relative terms. I think we're talking different problems here. In any case, I brought the cards back and got a refund, apparently many others had similar problems, even on consumer devices that *should* be able to use the SD card... (they were being sold to use in digital cameras) Perhaps this is an isolated issue with the Olin brand, dunno. -- Best regards, Kris _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
